Alloys or metallic compositions – Magnesium base – Manganese containing
Patent
1991-10-25
1994-08-30
Dean, Richard
Alloys or metallic compositions
Magnesium base
Manganese containing
148420, 420409, 420412, 420414, 603 93, 6038901, C22C 2300
Patent
active
053425766
ABSTRACT:
The invention provides a magnesium manganese alloy suitable for use in the production of a pellet 10 for administration to a ruminant by dposition in its rumenoreticular sac. A typical pellet 10 comprises a magnesium alloy tube 12 enclosing a degradable core formed of plurality of tablets 14, 16. The magnesium alloy used in the construction comprises at least 90% by weight of magnesium, uyp to 1% zinc and up to 2% of manganese. Preferably the alloy may further include aluminium, silicon or zirconium along with iron and beryllium. When deposited in an animal's rumen the alloy reacts with the rumen juices to form an anodic film over the exposed surface of the tube 12. This prevents corrosion or dissolution of the tube 12 except at its exposed ends where galvanic corrosion by coupling with the electrically conductive core 14, 16 is provided. The normal requirement of a non-degradable exterior coating e.g. resin for the tube exterior is obviated.
REFERENCES:
patent: 3182390 (1965-05-01), Foerster
patent: 4863455 (1989-09-01), Whitehead
Stuedeman et al, American Journal Veterinary Research, vol. 45, No. 4 (Apr. 1984), Efficacy of a Large Magnesium Alloy Rumen Bolus in the Prevention of Hypomagnesemic Tetany in Cows, pp. 698-702.
Castex Products Limited
Dean Richard
Koehler Robert R.
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